Train Travel to Hokkaido

The weather in Hokkaido is usually nice around this time of the year since there is no rainy season in Hokkaido. Taking a berth train is a popular way to go to Hokkaido. The Hokutosei and the Cappiopeia trains travel from Ueno Station to Sapporo Station in about 16 hours.
About Cassiopeia and Hokutosei Trains
Railways in Japan
How to Take Trains in Japan